// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_TOUCH_SELECTION_TOUCH_SELECTION_MENU_RUNNER_H_
#define UI_TOUCH_SELECTION_TOUCH_SELECTION_MENU_RUNNER_H_

#include "base/macros.h"
#include "ui/touch_selection/ui_touch_selection_export.h"

namespace aura {
class Window;
}

namespace gfx {
class Rect;
class Size;
}

namespace ui {

// Client interface for TouchSelectionMenuRunner.
class UI_TOUCH_SELECTION_EXPORT TouchSelectionMenuClient {
public:
    virtual ~TouchSelectionMenuClient() { }

    virtual bool IsCommandIdEnabled(int command_id) const = 0;
    virtual void ExecuteCommand(int command_id, int event_flags) = 0;

    // Called when the quick menu needs to run a context menu. Depending on the
    // implementation, this may run the context menu synchronously, or request the
    // menu to show up in which case the menu will run asynchronously at a later
    // time.
    virtual void RunContextMenu() = 0;
};

// An interface for the singleton object responsible for running touch selection
// quick menu.
class UI_TOUCH_SELECTION_EXPORT TouchSelectionMenuRunner {
public:
    virtual ~TouchSelectionMenuRunner();

    static TouchSelectionMenuRunner* GetInstance();

    // Checks whether there is any command available to show in the menu.
    virtual bool IsMenuAvailable(
        const TouchSelectionMenuClient* client) const = 0;

    // Creates and displays the quick menu, if there is any command available.
    // |anchor_rect| is in screen coordinates.
    virtual void OpenMenu(TouchSelectionMenuClient* client,
        const gfx::Rect& anchor_rect,
        const gfx::Size& handle_image_size,
        aura::Window* context)
        = 0;

    virtual void CloseMenu() = 0;

    virtual bool IsRunning() const = 0;

protected:
    TouchSelectionMenuRunner();

private:
    DISALLOW_COPY_AND_ASSIGN(TouchSelectionMenuRunner);
};

} // namespace ui

#endif // UI_TOUCH_SELECTION_TOUCH_SELECTION_MENU_RUNNER_H_
